Improvement in bit-braces



NITED STATES PATENT Orricn.

OBED PECK, OF SOUTHINGTON, ASSIGNOR TO WILLIAM A. IVES, OF NEW i HAVEN. CONNECTICUT.

IMPROVEM ENT IN BIT-BRACES.

Specification forming part of -Letters Patent N0. 54,650, dated May 8, 1866.

To all whom t may concern:

Be it known that I, OBED Puck, of Southington, in the county of Hartford and State of Connecticut, have invented a new and useful Im provementin Bit-Braces; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specication, and represent, in

Figure 1, a side View, Fig. 2, a section through X Y; Fig. 3, an end view, and Fig. et illustrates the operation.

My invent-ion relates to an improvement in that part of a bit-brace termed the socket,7 and is designed for more perfectly securing the bit in the socket.

To enable others skilled iu the art to coustruct and use my improvement, Iwill proceed to describe the same as illustrated in the accompanying drawings.

A is the socket part of the brace, fitted in the usual manner to receive the shank ol' the bit B. Around the socket I fit a sleeve, G, so as to move freely thereon within the limits allowed by its construction. Through the said sleeve I cut a slot, a, ruiming axially and from the upper end of the sleeve toward the bit, then turning and running spirally round the sleeve, as seen in Fig. l. I placca pin, c, into the socket through the slot a, which serves as a guide upon which to move the sleeve C, so that by turning the sleeve around the socket until the said pin can enter the straight part of the slot a the sleeve may be partially drawn from the socket, as seen in Fig. 4. The end of the sleeve C, as seen in Figs. 2 and 3, is partially covered by a plate, d, which serves to secure the bit in the brace, as hereinafter described. This completes the construction of my improvement.

Its operation :is as follows: Move the sleeve G to the position shown in Fig. 4,in which position the bit B may be inserted, as denoted in red, and set into the socket, as denoted in black. When the bit is thus inserted, move the sleeve O up until the spiral part of the slot c reaches the pin c; then turn the sleeve on the said pin. The spiral form of the groove, acting as a cam, draws the sleeve onto the socket until the plate d bears down upon the shank of the bit, as seen in Fig. 2, drawing the bit firmly into the socket and holding it securely there.

When it is desired to remove the bit, return the sleeve G to the position denoted in Fig. 4, and the bit may readily be remove-d.

The semicircular notch in the plate d, as seen in Fig. 3, should be sufciently large for the largest bit-spindle. The'shanks of all bits being the same size, the plate d will act alike upon all, irrespective of the size of the spindle.

I do not broadly claim the sleeve upon the socket ofthe brace for the purpose of securing the bit into the socket.

Having therefore thus fully described my improvement, what I claim as new and useful, and desire to secure by Letters Patent, is

The combination ot the sleeve O with the socket A, when the said sleeve is constructed with the vertical and inclined slot e, and the socket provided with a pin, c, and arranged to operate in the manner and for the purpose substantially as specified.

OBED PEGK. Witnesses: A

JOHN E. EARLE,

RUFUs H. SANFORD. 

